No matter before or after, it is a seam. The front and rear are crotch-added, that is, the front and rear meet, regardless of the front and rear. There is a crack on one side. Only one side has crotch, and there is one more. This kind is wearing two pairs of clothes at the back. There are two seams on one side. On the other side is the seam, with hip plus design. This is a seam in the back. If there is a non-slip design, if the non-slip bottom of the foot runs on the instep, it will be worn backwards. Also, now some people begin to add embroidery patterns to their stockings. For example, the Buddha House of Sakyamuni. Their stockings belong to this fashionable kind. Qiu is easy to recognize.